Class: VoxelammingGem::Turtle

Inherits:
Object
  • Object
show all
Includes:
Math
Defined in:
lib/voxelamming_gem.rb

Overview

Turtle graphics

Instance Method Summary collapse

Constructor Details

#initialize(build_box) ⇒ Turtle

Returns a new instance of Turtle.



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# File 'lib/voxelamming_gem.rb', line 357

def initialize(build_box)
  @build_box = build_box
  @x = 0
  @y = 0
  @z = 0
  @polar_theta = 90
  @polar_phi = 0
  @drawable = true
  @color = [0, 0, 0, 1]
  @size = 1
end

Instance Method Details

#backward(length) ⇒ Object 



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# File 'lib/voxelamming_gem.rb', line 384

def backward(length)
  forward(-length)
end

#down(degree) ⇒ Object 



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# File 'lib/voxelamming_gem.rb', line 392

def down(degree)
  @polar_theta += degree
end

#forward(length) ⇒ Object 



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# File 'lib/voxelamming_gem.rb', line 369

def forward(length)
  z = @z + length * sin(radians(@polar_theta)) * cos(radians(@polar_phi))
  x = @x + length * sin(radians(@polar_theta)) * sin(radians(@polar_phi))
  y = @y + length * cos(radians(@polar_theta))
  x, y, z = x.round(3), y.round(3), z.round(3)

  if @drawable
    @build_box.draw_line(@x, @y, @z, x, y, z, r: @color[0], g: @color[1], b: @color[2])
  end

  @x = x
  @y = y
  @z = z
end

#left(degree) ⇒ Object 



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# File 'lib/voxelamming_gem.rb', line 400

def left(degree)
  @polar_phi += degree
end

#pen_down ⇒ Object 



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# File 'lib/voxelamming_gem.rb', line 408

def pen_down
  @drawable = true
end

#pen_up ⇒ Object 



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# File 'lib/voxelamming_gem.rb', line 412

def pen_up
  @drawable = false
end

#reset ⇒ Object 



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# File 'lib/voxelamming_gem.rb', line 422

def reset
  @x = 0
  @y = 0
  @z = 0
  @polar_theta = 90
  @polar_phi = 0
  @drawable = true
  @color = [0, 0, 0, 1]
  @size = 1
end

#right(degree) ⇒ Object 



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# File 'lib/voxelamming_gem.rb', line 396

def right(degree)
  @polar_phi -= degree
end

#set_color(r, g, b, alpha = 1) ⇒ Object 



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# File 'lib/voxelamming_gem.rb', line 404

def set_color(r, g, b, alpha = 1)
  @color = [r, g, b, alpha]
end

#set_pos(x, y, z) ⇒ Object 



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# File 'lib/voxelamming_gem.rb', line 416

def set_pos(x, y, z)
  @x = x
  @y = y
  @z = z
end

#up(degree) ⇒ Object 



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# File 'lib/voxelamming_gem.rb', line 388

def up(degree)
  @polar_theta -= degree
end